Take-down construction for firearms.



J. M. BROWNING. TAKE-DOWN CONSTRUCTION FOR FIREARMS.

APPLIOATION run In. a0, 1913.

Patented June 24, 1913v "z "Ill/Ill! UNITED STATES IiATENT OFFICE.

JOILKM. BROWNING, 0F OGDEN, UTAH.

TAKE-DOWN CONSTRUCTION FOR FIREARMS.

To all whom it may concern:

Be it known that I, JOHN M-. Baownnvo, a citizen of the United States,resident of Ogden, Utah, have invented certain new and usefulImprovements in Take-Down Construction for Firearms, of which thefollowing is a specification.

My invention relates to improved means for securing a gun barrelremovably to the frame.

A principal object is to provide simple and efl'ective means for takingup play that may occur between the barrel and the frame.

A further object is to provide simple and effective means for lockingthe barrel in position.

Another object is to arrange the locking means to secure the adjustingmeans in position.

The invention consists'in instrumentalities and combinations thereof forcarrying out the foregoing and other objects, as will appear.

The drawing illustrates an exemplifying structure embodying theinvention, but it is to be understood that the particular constructioncan be varied greatly within the invention.

Figure 1 is a side view of a gun-frame and adjacent parts of the barrel,embodying my invention. Fig. 2 is a longitudinal section of theadjoiningparts of frame and barrel. Fig. 3 is a transverse section on the line aaof Fig.2. Fig. 4 is a transverse section on the line b-b of Fig. 2. Fig.5 is a front side perspective of the front end of the frame. Fig. 6 is aperspective detail of the barrel plate. Fig. 7 is a perspective detailof the barrel lock.

Reference character 1 designates the frame and 2 the barrel. In thefront end of the frame is a hole 3 provided with interrupted internalthreads 4. The rear part of the barrel is provided with a screw-thread5, and for some distance from the end this thread is interrupted as at6, Fig. 3.

The nut 7 is screwed upon the barrel thread. This nut is provided withperiplr eral serrations or teeth 8. Barrel-plate 9 has a circular partsurrounding the end of the barrel, and within this circular part areinwardly projecting lugs 10 which engage in grooves 11 cutin the barrel.The barrelplate is pushed onto thebarrel and against the nut, "as shownin Fig. 1, with lugs 10 in grooves 11. and is prevented from dropSpecification of Letters Patent.

Patented June 24, 1 913.

Application filed March 20, 1913. Serial No. 755,645.

grooves 15 in the sides of slot 12, so that the' lock may slide forwardand back. The rear end 16 of the lock is adapted to enter notch orsocket 17 in the front end of the frame. At one side of socket 17 is astop-pin 28 adapted to engage the barrel-plate member 9 and limit theturning movement of the barrel when the gun is set up. The lock is alsoprovided with a downwardly projecting finger-piece 18 knurled at 19 forthe convenient operation of the lock. At the forward end of thebarrel-lock is an upward projecting member 20 having serrations or teeth21 slidably engaging teeth 8 on the nut. The barrel-plate is alsoprovided with a socket 22, in which are located a plunger 23 and spring24. The point of the plunger engages notches 25 in the lock toyieldingly hold the lock in forward or rearward position.

The rear end 26 of the front stock 27 is so placed in relation to thebarrel-lock 13 that when the front stock is in position on the barrel,as shown, the lock can be moved forward sufliciently to disengage itfrom the frame socket 17, but not far enough to disengage teeth 21 fromteeth 8 of nut 7. In putting the parts together, the nut 7 is firstscrewed upon thread 5 and the barrel-plate placed on the barrel againstthe rear end of the nut and secured as above described.

The rear end of the barrel is then inserted in the frame and turneduntil the bottom part 9 of the barr-Bplate engages stop pin 28. thebarrel-plate until the latter is held firmly against the frame and sothat there is no play between the barrel and the frame. The barrel-lockis then put in place from the front, whereupon its teeth 21 engage teeth8 on the rear end of the nut and lock the latter in place. The frontstock is then secured to the barrel and prevents the barrcllock frombeing pushed forward sufliciently to'disengage nut 7.

if the barrel ever becomes loose in the frame for any reason, it can betightened by taking off the front stock, pushing the bar- The nut is nowscrewed back againstteeth from those of the nut and then turning the nutback against the barrel-plate sufficiently to take up the play. Theparts 5 are then replaced as above described.

1 claim: 1. The combination of a barrel, a nut thereon, abarrel-plate, abarrel-lock carried by the plate, and means whereby the barrel- 10 leekengages the nut to lock the same.

2. In a firearm, the combination of a frame, a barrel, a nut screwed onthe barrel to take up play between the barrel and frame. a barrel-lockadapted to engage the frame and means whereby the barrel-lock engages 15the nut to lock the same.

' JOHN M. BROWNING.

Vit-nesses L. M. TAYLOR,

MATTHEW GALT.

